Date : Wed, 27 Feb 2008 00:22:03 +1100
From : msmcdoug@... (Mark McDougall)
Subject: BBC FPGA Boots to BASIC... almost...
Jonathan Graham Harston wrote:
> This just pokes the characters into the MODE 7 screen. You could
> stick it at &C000 over the font, change &FFEE to JMP &C000. It
> would show if the VDU code is causing the problem. You'd get
> something like the following:
>
> **BBC Computer 32K****BASIC****>hello***
> *Mistake**>PRINT fred****No such variabl
> e**>P."Hello"**Hello**>
Well, I now have a functional, if not somewhat crude, MODE 7 implementation.
Errors in this mode, as expected, freeze the machine.
Next step is to patch the ROM as you suggested...
Regards,
--
| Mark McDougall | "Electrical Engineers do it
| <http://members.iinet.net.au/~msmcdoug> | with less resistance!"